Edward l



E. L. TRUBA.

BALL BEARING. ,040- PatentdJune 21, 1.898.

(No Model.)

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EDWARD L. TRUDA, 4or DETROIT, Mrci-neAN.

BALL-BEARING.

SPECIFICATION 'forming' part Of Letters vJEatent No. 606,040, dated June 21, 1898.

Application filed July 6, 1897. Serial No. 643,606. (No model.)

To @ZZ whomz'/ may concern.-

Be it known that I, EDWARD L. TRUBA, a citizenof the United States, residing at Detroit, V in the county of VayneY and Stateof Michigan, have invented certain new and useful Improvements in Ball-Bearings,v of which the following is a specification,reference beinghadtherein to the accompanyingdrawings.

The invention relates to the construction of aball-bearing, and particularly to that type of ball-bearing in which there are a minimum number of balls held at specified distances apart at alll times by a'spacing plate or disk.

The invention consists in the construction of the bearing proper of that type known as a four-pointed bearing and in the means of adjusting and securing the bearing faces or cones and in the dust-proof and oil-proof features and the locking means for the various parts and in the arrangement, construction, and combination of the various parts, all as more fully hereinafter described, and particularly set forth in the claims.

In the drawings, Figure l is a section through the hub of a rear wheel of a safetybicycle embodying. my invention. Fig. 2 is a cross-section thereof on line fr Fig. 3 is a detached perspective view of the spacing and ball-retaining plate or disk.

A is a shaft or axle.

B is the hub or casing. In this construction I have'shown the hub; but it is evident without further illustration or description that the same construction of bearing, dac., may be applied to the crank-shaft or any part of a bicycle, if desired. On the shaft is a sleeve C, having` the enlargements D on each end, with the inclined faces a, which form one side of the inner ball-race for each set of balls.

E are the outer cones, which are provided with suitable screw-threads to engage with corresponding threads on the ends of the shaft, as shown at b. These cones have correspondingly-inclined faces opposite the ineline tothe faces ct on the sleeve C, and the two form in effect a two-pointed inner bear-` ing for theballs on the shaft.

The'sleeve C is Vheld from rotation on the shaft byany suitable means. I have shown a screw F, entering in a slot F in the sleeve and screwed into the shaft or axle, so that the sleeve may have an endwise movement on the axle, but cannot rotate thereon.

f In the casing or hub Beat the ends are the rings G and G. One ofv these rings is free to have a sliding movement in relation to the sleeve C, while the other is fixed in relation thereto. I have shown the ringG'- as fixed and held inl position against endwise movement by means of the thread on lthe ring G and the dust-ring II, engaging in the screwthreadin one end of the'hub andcontacting the outer face of the ring G. substantially similar dust-ring is provided at the other end of the bearing.

b' and c are packing-rings at opposite ends A similar or of the ring G', and in this case I have shown the packing-ring c as formed in a groove in the dustring I-I. The ring G is provided with a keyway or. a key, engaging with the key or keyway d on the hub, so that it may be'moved toward or from the ring G. Both these rings are provided with corresponding grooved bearing-faces I-I, the balls I being between these latter and the cones on the shaft previously described and contacting at four points, as plainly shown at Fig. l, so as to make a four-pointed bearing.

. To take up the wear or to adjust the bearing, the cones E may be adjusted in or out, and by having the sleeve C and the ring G slidingly secured this adjustment will center the bearing in relation to the balls. I prefer, however, to adjust the ends separately. The cones E, I preferably lock in position, first, by means of ring-shaped nutsJ, engaging in exterior screwthreads on the cones and which jam against the frame K of the bicycle, and7 second, by nuts L, 4which engage interior screw-threads in the cones and jam against the endsv of the shaft. Between these last nuts and the shaft I place the packing-rings e in the spaces formed by grooves in the cones and bevels on the inner faces of the nuts L; These Vbevel faces compress the packingrings so that it is impossible for oil to'leak throughtliem.

lIn order to make the. device absolutely dustproof, I secure over each jend ofthe entire axle and the cones a dustscap M, having a IOO marginal flange N, this dust-cap being of li ght sheet metal and having secured to and extending from its center a screw-pin O, which passes through a central aperture in the nut L and engages a screw-threaded hole in the end of the shaft for securing the cap in place.

The d ust-rin gs II extend down in close proximity to the cones E and are each preferably provided with an inwardly-extending fla-nge P, which rides in close contact with the washer Q, fitting in a groove in the cone so as to make a dust and oil proof jointv at that point. The

hub B has at each end opposite the flange Pv a similar fiange 13', these iianges serving to retain the oil in the ball-races.

R is a screw-cap fitting in an aperture in vthe hub B, provided with a greoved flange which fits over a corresponding flange R' on bushing R2, which is secured in the aperture in the hub, as shown in Fig. i.

This cap has l a packing-rin g R3 in a groove in its under face, which bears against the flange R and, being l compressed, forms an oil-proof and dust-proof g joint.

This cap is in line with a screw F, so

that the screw may be fastened through the hole when the cap is removed.

"In the construction which I have shown three balls are employed for each ball-race, these balls being equidistant from each other and running in the ball-race described.

Sleeved on the shaft A and between the bearing-faces of the inner cones is a spacing plate or disk S, cut away at the three points where the balls are located, as shown in Figs. 2 and 3. This disk is provided with three con- Vex bearing-faces T, which are the only points the friction, I also form convex faces Vin the' cut-away portions or recesses in the disk, so that the balls only contact on these convex portions. All the contacting faces of the disk are sharpened to a knife-edge and preferably hardened. r

The balls are maintained in proper rela-tion to each other by means of the spacing-disk, which has but very little friction either on g the balls or the shaft with the construction described, and my experience is that a three- `ball ball-bearing of this kind will run with cured in relation thereto, the sleeve being secured against rot-ation, but free to have a limited endwise movement, outer ball-races and the balls.

2. In a ball-bearing, the combination with the axle and its inclosing casing or hub', of inner ball-races formed by an endwise-movable sleeve such as C having opposite inclines at the ends, cones adjustable to and from these inclines on the sleeve, rings in the hub or casing opposite the inclines and cones and each having a groove to form an outer double oppositely-inclined bearing-face for the balls, one of these rings having an endwise movement, and the balls between the bearing-faces having four points of contact therewith, substantially as described.

3. In a ball-bearing, the combination with the casing or hub, and ball-races and balls therein, of washers such as Q carried by and moving with the shaft, the dust-rings II secured to the casing or hub and having their inner faces in close proximity to the washers Q., substantially as described. l

4t. In a ball-bearing, the combination with the shaft and the casing or hub, of the ways, the balls therein, the dust-rings II adapted to close the spaces between the casing and the shaft and having the inwardly-extendin g anges P, and the washers Q on the inner members of the ways with which said flanges are in close proximity, substantially as described.

5. In a ball-bearing, the combination w ith the shaft and the casin g or hub, of the sleeve C on the shaft having the end bearing-surfaces, the cones E secured to the ends of the shaft and having exterior grooves, the washers Q in these grooves, the dust-rings II secured to the casing or hub and having the flanges P approximately contacting the washers, the balls, and outer bearing-surfaces for the balls, substantially as described.

6. In a ball-bearing, the combination of the axle having an inner.bearing-surface for the balls, the casing or hub having an outer bearing-surface therefor, balls between said surfaces, the dust-rings II each having the inwardly-projecting flange P, and the flanges P on the hub or casing B opposite the flanges P for the purpose described.

7. The combination with a vehicle-frame, of aball-bearing comprising a shaft, the balls, their ways including the outer cones E, each having an outwardly-extending end embraced by the frame, and clamping-nuts .I screwthreaded onto the outer ends of the cones securing the bearing tothe frame of the vehicle and locking the cones in position, substantially as described.

S. In a ball-bearing, the combination with the shaft, the hub, the balls, and their ways including the outer cones E projecting beyond the ends of the shaft and interiorly screw-threaded, of the nuts L engaging in IOO IIO

j 606,040 sj these interior screw-threads and packing material adapted to be compressed by said nuts,

substantiallyas and for the purpose described.

the shaft, the dust-caps M having overhang` ing iianges, and the screws O engaging the screw-threads in the ends of the shaft and passing through the apertures in the nuts L, substantially as described.

l0. In a ball-bearing, the combination,with the shaft, the hub, the balls, the Ways including interiorly-screW-threaded end cones being adjustable on the shaft and projecting beyond the ends of the same, of the nuts L engaging with the screw-threads and contacting the ends of the shaft and having their inner faces beveled, and packing-rings compressed by such beveled faces against the cones and the ends of the shaft, substantially as described.

1l. In a ball-bearing, the combination with the shaft, the hub or casing, the balls, and

their ball-races,of a spacing-disk having opensided recesses or notches for the balls, arms or yokes carried by the disk adapted to have side contact with the balls and overhanging bearing portions such as U' on the disk Whereby the disk acts as a ball-retainer, substantially as described.

l2. In a ball-bearing, the combination with the shaft, the hub or casing, the ball-races and the balls therein, of a spacing-disk recessed to receive the balls and being 'supported on the shaft or inner bearing-surface, yokes on the disk having side contact with the balls and the convex projections V in the recesses of the disk for the purpose described.

13. In a ball-bearing, the combination of the hub or casing, the shaft, the endwisemovable sleeve C having a slot therein, the screw F engaging said slot in the sleeve to permit the endwise movement but to prevent rotation, the hub or casing having an aperture opposite said slot, the bushing in the aperture interiorly screw-threaded, the cap R fitting in the bushing and the packingring R3 fitting in a groove in the under side of the cap,` substantially as described.

In testimony whereof I affix my signature in presence of two Witnesses.

EDWARD L. TRUBA.v

Witnesses:

M. B. ODOGHERTY, OTTO F. BARTHEL. 

